Why might this differ from my mosque's or country's official Hijri date?

This calculator uses a fixed arithmetic (tabular) calendar, while many communities and countries determine the start of each Hijri month by local moon sighting, which can shift the date by a day or two from the tabular calculation.

Can I convert a Hijri date back to a Gregorian date?

This calculator converts from Gregorian to Hijri only, enter a Gregorian date to see its Hijri equivalent.

Hijri Calendar Converter

Convert a Gregorian date to the Islamic (Hijri) calendar date.

How this is calculated

Tabular Islamic calendar algorithm via Julian day number conversion

Assumptions used in this calculation

Algorithmic approximation: Uses the tabular (arithmetic) Islamic calendar, which may differ by a day or two from moon-sighting-based religious calendars.

About this calculator

The Hijri calendar converter converts a Gregorian date to the corresponding Islamic (Hijri) calendar date using the standard tabular (arithmetic) algorithm.

Worked example

1 January 2024

Result: 19 Jumada al-Thani 1445 AH

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Hijri Calendar Converter

About this calculator

Frequently asked questions

Why might this differ from my mosque's or country's official Hijri date?

Can I convert a Hijri date back to a Gregorian date?

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